GEM 1.x

GEM is a graphical application environment that runs on top of MS/PC-DOS. It was built on the technology of Digital Research's GSX portable runtime (Used in DR-Draw and DR-Graph ) . Notably, a port of GEM and CP/M was used as the primary GUI on the M68k based Atari ST. GEM was also bundled with Amstrad computers.

It competed against the Apple Macintosh, but beat Microsoft Windows to market.

Apple sued Digital Research over their look and feel, which resulted in GEM 2.0 removing overlapping windows from its desktop file management.